Thank you all - I'm much more educated now. 39 different locations (I've never seen the Las Vegas Numismatic chip), so 38 casinos, and just from those I still need: Mint Casino downtown Vegas, The Treasury, and the Travel Lodge.
As far as the variations go: I'm going to start with: Slots a fun yellow inserts, Horseshoe Club Reno black/white, and a POX on the Stateline in Wendover for having 12 varieties (of which I suppose I need the Dark Gray).
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